Deal with Github Actions deprecation warnings (#11)

action.yml

@@ -23,7 +23,7 @@ runs:
   steps:
     - name: Setup Python
       id: setup-python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ inputs.python-version }}
 
@@ -40,12 +40,12 @@ runs:
     # https://github.com/snok/install-poetry/blob/main/README.md#caching-the-poetry-installation
     - name: Locate user site
       id: site-user-base
-      run: echo "::set-output name=dir::$(python -m site --user-base)"
+      run: echo "dir=$(python -m site --user-base)" >> "$GITHUB_OUTPUT"
       shell: bash
 
     - name: Restore/cache poetry installation
       id: poetry-install-cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ${{ steps.site-user-base.outputs.dir }}
         key: poetry-install-cache-${{ steps.setup-python.outputs.python-version }}-${{ inputs.poetry-version }}
@@ -59,12 +59,12 @@ runs:
     # Again, we're following snok/install-poetry's README.
     - name: Locate poetry venv
       id: poetry-venvs
-      run: echo "::set-output name=dir::$(python -m poetry config virtualenvs.path)"
+      run: echo "dir=$(python -m poetry config virtualenvs.path)" >> "$GITHUB_OUTPUT"
       shell: bash
 
     - name: Restore/cache poetry venv
       id: poetry-venv-cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ${{ steps.poetry-venvs.outputs.dir }}
         key: poetry-venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}-${{ inputs.extras }}